Pattern-grading device



(No Model.) 2 Sheets-Sheet 1.

- E. P. DWYER.

PATTERN GRADING DEVICE.

No. 438,147. Patented Oct. 14, 1890.

WITNESSES INVENTUFQ A Q M 2 Sheets-Sheet 2 (No Model.) E. F. DWYBR.PATTERN GRADING DEVICE. No 438,147. Patented Oct. 14, 1890.

WITNESSES}; lNvENTnP MAM q W Q THE mmms PETERS 00., PNoro-uma,WASHINCTUN, a. c.

: ATENT FFICE.

EDI/VARD F. DWVYER, OF LYNN, MASSACHUSETTS.

PATTERN-GRADING DEVICE.

SPECIFICATION forming part Of Letters Patent N0. 438,147, dated October14, 1890.

' Application filed May 3, 1889- Serial No. 309,423. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD F. DWYER,of Lynn, in the county of Essex andCommonwealth of Massachusetts, have invented a .certain new and ImprovedPattern-Grading Device, of which the following, taken in connection withthe accompanying drawings, is a specification.

This invention relates to a mechanism for grading patterns, and morespecifically to that class of said mechanisms whereby a pattern of agiven size and form is employed or taken as a unit and other patternsdescribed therefrom which differ in size proportionally.

In the drawings, Figure 1 is a plan view of my invention represented inconnection with a shoe-pattern. Fig. 2 isa perspective of the deviceinverted. Fig. 3 is a section on line3 3 of Fig. 1. Fig. 4; is a sectionon line 4 4 of Fig. 1. Fig. 5 is a plan representing amodified use ofthe invention.

In carrying out my invention I employ the rod a, which is provided withan offset 1), having a channel-groove c. On the rod to are slides ef,and in the channel a is arranged the slide it. The said slides areconnected by an intermediate mechanism composed of the bars 4 4. To thatend said bars are connected by swivel-joint n and have swivel-jointconnections, as shown, with the slides e f. Connection is made with theslide it by introducing a projection of the slide into agroove m, formedin the bar. A set-screwp operates to hold the slide fixed in the bar andpermits of ready adjustment of the slide relatively to thetraveler-point, as hereinafter specified.

The slide 6 is provided with a downwardlyprojecting point 5, and in therod a is fixed a point 6. Said point 6 consists of a metallic pin setinto a suitable socket formed in the rod and is pressed downward by aspring 8. It is designed as the marking-point, and instead of themetallic pin a pencil-marker may be employed whenever the workto be donerequires that kind of a marker. Intermediate the point 5 and themarker-point 6 is a point 7, which in operationtravels aboutthe edgeface of the pattern, and to that purpose it is called thetraveler-point. It is connected with the slide f. To that end a lever 9has its rear end swiveljointed to the slide, as shown. The lever 9 isfurther provided with an oblong hole 10,

through which passes a screw 11., the object of this arrangement beingto permit a slight lateral movement of the lever, as and for purposes tobe hereinafter described.

I now proceed to describe the operation of I this my invention, and tothat end I take a pattern, as A, Fig. 1. It is my purpose to construct aseries of patterns which shall differ 6o proportionally from the patternA. The apparatus is positioned over the pattern with the point 5 bearingthereupon at the proper place. The traveler-point 7 is made to bear (seeFig. 3) against the marginal edge face of 6 5 the pattern, while themarker 6 extends forward to bear upon the material from which theintended pattern is to be formed and projects downward so as to describea mark thereupon when the instrument is moved. The 7c operator placesone hand upon the handle B and the other hand upon the handle H. He

then steadies and holds the handle B so as to retain the point 5 fixedin its predetermined position on the pattern, and with the handle H hemoves the instrument, thereby carrying the traveler-point 7 entirelyround the pattern A, during which operation the travelerpoint is made tobear against the marginal edge face of the pattern, and the marker 6 isallowed to bear upon the material and de scribe a new pattern. Themarking-point is made to approach and recede from the traveler-pointproportionally as the traveler-point approaches and recedes from thefixed point 5, so that the intended pattern differs proportionally fromthe pattern A. The size of the intended pattern relatively to thepattern A is predetermined by the location of markingpoint 6 relativelyto the traveler-point 7, and this relation is changeable to obtaindifferent sizes by an obvious adjustment of the slide h.

In some cases it may be desired to grade from a large pattern downwardto smaller sizes. In such case the material out of which the pattern, asA, is taken being preserved as a pattern, the marker 6 is now employedas a traveler, while the traveler 7 is employed as a marker. The point 5is fixed in the blank space previously occupied by the pattern A and themarker 7 is made to trace the edges of the skeleton pattern left by theremoval of the pattern A.

To obtain absolute accuracy of measurement, it is necessary to allow forspace occupied by the material composing travelerpoint 7. To this end Iallow lateral movement of the point equal to one-half its diameter incross-section. To obtain this I employ a swivel-lever 9, which isprovided with the slot 10, as shown. The point 7 is concaved on one sideto permit the point 6 an approach to its center.

I claim- 1. In combination, the point 5, the slide f, carrying the point7, said slide being movable toward and from the point 5, the support forsaid slide f, jointed connections 4 between the slide f and point 5, amarking-point 6, movable toward and from the slide f and point 7, andthe means for operating the point 6 from the bar 4, substantially asdescribed.

2. In combination, the slides c and f, carrying the points 5 and '7,respectively, the sliding rod a for supporting said slides, the bars 44, jointed together and connected with the slides, a marking-point 6 onthe rod a, and an operating connection between the rod (1 and the bar 4,substantially as described.

3. In combination, a slide f, carrying a point '7, a sliding rod a,passing through the point- -slide f and carrying a point 6, a fixedpoint 5,

and an operating connection from the rod a and slide f to the fixedpoint 5, subtantially as described.

4. In combination, the bar a, the slides e and f, carrying points 5 and7 on said bar, jointed bars 4 4, connecting said slides, one of saidbars being slotted, a point 6 on the bar a, and a slotted arm I) on thebar a, connected With the slotted portion of the bar 4 by an adjustableslide h, substantially as described.

5. In combination, the bar a, the slides e and f, carrying points 5 and7 on said bar, jointed bars 4 4, connecting said slides, a point 6 onthe bar a, and an arm hon the bar a, pivotally connected with one of thebars 4, substantially as described.

6. In combination, in the described device,

comprising a fixed point 5, a marking-point 6, and a pattern-point 7,with supporting and operating means, an arm 9 for the point 7, pivotallysupported to allow lateral play, and the means for limiting said lateralmovement, substantially as described.

EDWARD F. DVVYER.

l/Vitnesses:

GEo. H. WILLIAMS, 0. B. TUTTLE.

